Thursday, February 1, 2007

Detecting rain

Pompie needs to detect rain: not only is my pond a home for my goldfish. It's also a means to dispose of access rain water. So the filter, in which the rain water is drained, doesn't need extra water from the pond when it is raining. The rain detector will be two L shaped aluminum strips of about 5 cm glued together with an isolator in between. Connected to an IO port of Arduino by a 10k resistor as the circuit describes.
  • No rain will have a 1.
  • With rain the readout will be 0.